The invention is directed to an anchor for fixing a tendon or a ligament in a bone comprising: an elongated tubular body having a bore extending along a longitudinal axis, said tubular body comprising first and second independent parts slidably contacting each other, the first and second independent parts each having an outer circumferential surface along a length thereof parallel to the longitudinal axis, and each having an elongated partial inner bore, such that the tubular body is capable of mounting a tendon or ligament within the partial inner bore.